* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.content {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.item {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.loading {
    text-align: center;
    padding: 20px;
    color: #7f8c8d;
    display: none;
}

.sentinel {
    height: 1px;
    background: transparent;
}